Brake and clutch mechanism for transmissions



NOV. 30, 1948. A GEDDES BRAKE AND CLUTCH HECHANISH FOR TRANSMISSIONSFiled June 15, 1944 2 Sheets-Sheet 1 2 8 2 S 5 mm M 3 5 u+ 8 a i & mo 3n. a 3 an 2 S v mm 83 ma 6 6 m a 8 mm uh & S I 8 2, 8 .N 2 m. 2 m

Q. A. GEDDES Nova 3 1948.

BRAKE AND CLUTCH MECHANISM FOR TRANSMISSIONS 2 Sheets-6mm 2 Filed Jim15,

Mung

Patented Nov. 30, 1948 BRAKE AND CLUTCH MECHANISM FOR TRANSMISSIONSGeorge A. Gcddes, Minneapolis, Minn. Application June 15, 1944, SerialNo. 540,449

d Claims.

My invention relates to an improvement in transmission, wherein it isdesired to provide a means of transmitting power from two separatesources to a driven element, or in transmitting power from a driveelement to two driven elements.

In the transmission of power from two separate I elements to a drivenelement, difficulty is sometimes experienced in providing a smooth flowof power to the driven element. It is sometimes difficult to transmitpower in such a manner that little or no strain is placed upon the driveunits or the driven elements.

It is the object of the present invention to provide an apparatus inwhich either or both of two separate power elements may beconnected to asingle driven element without strain or damage to any of theconnections.

A feature of the present invention lies in the provision of clutch meansconnecting each of two power sources to a. driven element. Thus thedriven element may be disconnected from either or both of the driveunits as is desired.

A further feature of the present invention lies in the provision of abrake means for halting rotation of the drive element when it is not inuse. For example, if the drive element is a wind actuated propeller, orthe like, this propeller may be held stationary while not connected tothe driven unit.

A further feature of the present invention lies in the provision of astructure in which two separate power supply units are normally clutchconnected to a driven element, and in the provision of a means forreleasing one or both clutches when-it is so desired. As a result thedrive units ordinarily operate at the same speed, but the speed of onemay vary to some extent if one of the connecting clutches is permittedto slip.

While my device is particularly designed to conmeet two separate sourcesof power supply to a driven element, it is obvious that a single drivingelement may operate to drive two driven elements through suitable clutchmeans. In such an arrangement, the driven elements may be held fromrotation while not in use.

These and other objects and novel features of my invention will be moreclearly and fully set forth in the following specification and claims.

In the drawings forming a part of my specification:

Figure 1 is a sectional view of a transmission showing the constructionthereof.

Figure 2 is a sectional view on the line 2-4 of Figure 1.

The transmission A is shown including a drive shaft I 0 and a, secondaligned drive shaft i I. The shafts i0 and ii extend through suitablemeans 52 and i3 respectively in the transmission housing ii.

The housing M is longitudinally separated into two halves iii and i8.Each of these casing sections is provided with a flange at the open endthereof. The flange on the casing section i5 is designated by thenumeral i1, while the flange on the section to is designated by thenumeral i9. Bolts 23 extend through the flanges ii and 59 to bolt thecasing sections together.

As best illustrated in Figure 2 of the drawings the casing is also splitlongitudinally in preferred form, dividing the casing section l5 intoupper and-lower sections 2! and 22 respectively. The casing section itis divided into upper and lower sections 23 and 26 respectively. Thisdivision of the casing it into four connected parts permits readyassembly of the various elements.

Extending inwardly from the inner walls of the cylindrical casing i5, Iprovide a ring-like flange 25 which terminates in an inclined coneshapedflange 26. The casing section it is likewise equipped with an inwardlyextending ring-shaped flange 21 which terminates in a cone-shaped flange29. The cone-shaped flanges 28 and 29 are provided with a frictionsurface so and 38 respectively of any suitable material such as clutchfacing material, brake lining or the like.

The diameter of the shaft ill is increased internally of the housingsection i5 to provide a relatively large diameter portion 32. A sleeve33 is slidably keyed to the shaft portion 32 to slide longitudinallywith respect thereto. The inner extremity of the sleeve 33 is equippedwith a cone-shaped flange 35. The flange 35 is provided with a. frictionsurface 36 of any suitable material. The shaft i I is increased indiameter inside of the casing section 86 to provide a large diameterportion 31. A sleeve 39 is slidably mounted upon the shaft portion 3'!and is keyed thereto to rotate with the shaft. The sleeve 39 is providedat its inner extremity with a cone-shaped flange 4|. A layer of frictionmaterial 42 of any suitable type is mounted upon the flange 4|.

A pair of integral ring-shaped flanges 43 and 44 are provided on-thesleeve 33 at a point spaced from the ends thereof. A lever 45 ispivotally secured to the casing I4 and is illustrated extendingtherefrom. The lever 45 which is pivoted at 48 is provided with abifurcated end 47, each fork of which supports a roller 49 by means of apivot 50. As a result the sleeve 33 may be moved in either direction bythe forked lever 45.

A ring 5| is separated from the flange 44 by means of an anti frictionbearing 52. A spring 53 encircles the sleeve 33 between the ring 5| andthe end 54 of the casing section l5. The spring 53 urges the ring 5i andaccordingly the sleeve 33 inwardly away from the wall 54, thus normallyholding the friction surfaces and 33 separated.

The sleeve 31 is provided with a pair of spaced flanges 55 and 56. Asecond arm pivoted to the casing section II; by the pivot 46 is providedwith a bifurcated end 41. Each fork of the lever 45 supports a pivot 50upon which is mounted a roller 49 engaged between the flanges and 56. Bypivoting the lever 45 the sleeve 39 may be operated in either direction.

It will be noted that both of the levers are provided with the samedesignating numerals. This is done in view of the fact that both leversare identical and every part of these levers is the same.

A ring 51 is spaced from the flange 55 by means of an anti frictionbearing 59. A spring 50 encircles the sleeve 39 and extends between theclosed end 6! of the casing section i6 and the ring 51. The ring, andaccordingly the sleeve 39, is thus urged away from the wall BI, thusnormally separating the friction surfaces 4| and 42.

A ring-shaped flange (52 extends inwardly from the cylindrical wall ofthe casing section i5. A similar ring-shaped flange 63 extends inwardlyfrom the casing section it. A gear 64 is positioned between the flanges52 and 63. Anti friction bearings 65 and 55 space the gear 54 from theflanges 52 and 83 respectively and absorb end thrust exerted against thegear 64.

This gear 64 is supported by a shaft 61 which extends into the innerends of the enlarged portions 32 and 31 of the shafts ill and II. Theseshafts In and I l are axially bored to accommodate the shaft 61. Thrustbearings 69 and Ill are provided between the ends of the shaft 51 andthe bottom of the bores or recesses in which the shaft is supported.

The flanges 35 and H are equipped with friction rings H and I2 thereuponon the sides thereof opposite the friction surfaces 36 and 42. Thesefriction surfaces are normally urged against the cone-shaped flanges 15and 16 on opposite sides of the gear 64 by the pressure of the springs53 and 60. The flanges l5 and it may also bear a friction surface H and19 if desired. Thus as the shaft Ill rotates the sleeve 33 which issplined or keyed thereto also rotates and the spring 53 urges thefriction surface H against one side of the gear 64. Similarly as theshaft ll rotates, carrying the sleeve 39 therewith, the friction surface12 is urged by the spring into engagement with the opposite surface ofthe gear 64. Thus both shafts l0 and H are normally connected to thedriven gear 64.

When it is desired to disconnect either of the shafts In or II from thegear 64, it is only necessary to operate one of the levers 45 so as topivot the corresponding friction surface H or 12 out of contact with thegear 64. If it is desired to stop rotation of either shaft Ill or II,this may be accomplished by continuing pivotal motion of thecorresponding lever 45 so that the friction surfaces 30 and 36 are inengagement, or the friction surfaces 3| and 42 are engaged. Suchfriction engagement tends to brake the corresponding shaft and to holdthe same stationary.

The gear 64 may rotate any driven device by 4 any suitable means. Figure2 illustrates a gear 13 which is in mesh with the gear 54 and which isprovided with a shaft 14 which may extend out of the casing and connectto any suitable member.

When the drive unit includes the shafts l0 and I I, the shaft 14comprises the driven shaft. This driven shaft may be operated by eitherthe shaft l0 or the shaft II, by both shafts l0 and H, or by neither ofthese shafts as desired.

If desired the shaft 14 may comprise the drive shaft, acting through thegears 13 and 54 to selectively drive either or both of the shafts l0 andl I.

In accordance with the patent statutes. I have described the principlesof construction and operation of my transmission and while I have endeavored to set forth the best embodiment thereof, I desire to have itunderstood that obvious changes may be made within the scope of thefollowing claims without departing from the spirit of my invention.

I claim:

1. A transmission comprising a casing, a pair of spaced aligned shaftssupported by said casing, a coaxial gear supported between said shafts,a pair of friction means on said gear, a clutch means slidably mountedupon each of said shafts for movement toward or away from said gear,means for moving said clutch means toward or away from said gear, saidclutch means comprising an outwardly extending flange having a frictionsurface on opposed faces thereof, friction means on said casing, certainof said friction surfaces on said flanges engaging correspondingfriction means on said gear when moved toward said gear and the otherfriction surfaces on said flanges engaging the corresponding frictionmeans on said casing when said flanges are moved away from said gear tohold the corresponding clutch means and shaft upon which it is mountedfrom rotation.

2. A transmission comprising a casing, a pair of axially aligned shaftssupported by said casing, a coaxial gear supported between said shafts,friction means on said gear, a clutch means slidably supported on eachof said shafts for movement toward or away from said gear, means formoving said clutch means toward or away from said gear, an outwardlyextending flange forming a part of each clutch means, a friction surfaceon one side of said flanges engageable against the friction means onsaid gear in one position of said clutch means, friction surfaces on theother side of said flanges, and stationary means on said casing againstwhich the second friction surfaces may engage in a. second position ofsaid clutch means when the same is moved away from said ear.

3. A transmission comprising a casing, a pair of spaced aligned shaftssupported by said casing, a gear rotatably supported between saidshafts. a pair of friction means on said gear, a sleeve slidablysupported on each of said shafts for movement toward or away from saidgear, means for moving said sleeves toward or away from said gear, acone shaped flange supported by each of said sleeves, friction surfaceson each side of said flanges, one friction surface of each flange beingengageable with one of said friction means on said gear when movedtoward said gear, and means on the casing engageable with the remainingfriction surfaces of said flanges when said flanges are moved away fromsaid gear.

4. A transmission comprising a casing, a pair of aligned shaftssupported by said casing, a co- 5 6 axial gear supported between saidshafts, a 'pair REFERENCES CITED of friction means on said gear, asleeve slidably J mounted on each of id shafts for nt; The followingreferences are of record in the toward or away from said gear, means formoving file Of this P ten said sleeves toward or away from said gear, aUNITED STATES PATENTS cone shaped flange on each of said sleeves,

friction surfaces on one side of each of said Number N Date flanges,means on said casing against which said 542,330 Lavigne 80. 8 0 frictionsurfaces may engage, and friction sur- 399,247 Drake sept- 1903 faces onthe other side of said flanges engageable 10 1,461,300 Lewis July 1923against said friction means on said gea when 1,865,022 Larson une 28,1932 said flanges are moved toward said gear, 7 1,865,129 n ll June 28,1932 EO GEDDES, 1, 8 Vermette Dec. 7, 1937

